Sandy could do nothing but _____ to his teacher that he was wrong.
| A．admit | B．admitted | C．admitting | D．to admit |
Special attention should be _____ to air pollution wherever the factory will be built.
| A．made | B．paid | C．taken | D．Sent |
In our class,when the bell rang and the teacher closed his book ,it was a ________for everyone to stand up .
| A．signal | B．chance | C．mark | D．measure |
He is so busy with the research _____ he has no time left for any other activity.
| A．which | B．that | C．why | D．Because |
It was going to be some time _____ he would see his father again.
| A．before | B．after | C．since | D．When |
She does not know _____ the situation, for she is too inexperienced.
| A．how to deal with | B．what to deal with |
| C．how to deal with it | D．what to do with it |